Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 245/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 25.79 (655) | -3.86 (-98) -13% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 93.13 (2365.62) | 81.01 (2057.74) | -12.12 (-307.88) -13% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 2.89 (73.5) | -1.93 (-49) -40% |
| Revolutions per mile (km) | 680.31 (422.72) | 782.09 (485.97) | 101.79 (63.25) 15% |
245/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.4 mph (28 km/h) |
| 25 mph (40.23 km/h) | 21.75 mph (35 km/h) |
| 30 mph (48.28 km/h) | 26.1 mph (42 km/h) |
| 35 mph (56.33 km/h) | 30.44 mph (49 km/h) |
| 40 mph (64.37 km/h) | 34.79 mph (56 km/h) |
| 45 mph (72.42 km/h) | 39.14 mph (63 km/h) |
| 50 mph (80.47 km/h) | 43.49 mph (69.99 km/h) |
| 55 mph (88.51 km/h) | 47.84 mph (76.99 km/h) |
| 60 mph (96.56 km/h) | 52.19 mph (83.99 km/h) |
| 65 mph (104.61 km/h) | 56.54 mph (90.99 km/h) |
| 70 mph (112.65 km/h) | 60.89 mph (97.99 km/h) |
| 75 mph (120.7 km/h) | 65.24 mph (104.99 km/h) |
| 80 mph (128.75 km/h) | 69.59 mph (111.99 km/h) |
| 85 mph (136.79 km/h) | 73.94 mph (118.99 km/h) |
| 90 mph (144.84 km/h) | 78.29 mph (125.99 km/h) |
| 95 mph (152.89 km/h) | 82.64 mph (132.99 km/h) |
| 100 mph (160.93 km/h) | 86.99 mph (139.99 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990 | 2312 | 2490 | 2600 | 2719 | 2803 | 2896 | 3007 | 3159 | 3311 | 3481 | 3616 | 3862 | 4133 | 4345 | 4480 | 4556 | 4836 | 5226 | 6072 |
Better Fuel Economy Factory Ratios Increased Power
